Pinker has written about language and cognitive science at every level, from technical papers to approachable popular science. He is most noted for his work on how children acquire language and for his furthering of Noam Chomsky's work on language as an innately-wired development of the evolutionary process.
Books by Steven Pinker
Language Learnability and Language Development (1984)
Visual Cognition (1985)
Connections and Symbols (1988)
Learnability and Cognition: The Acquisition of Argument Structure (1989)